Update v1.0 references throughout repo to v1.1

[nficano]

Rust SDK claims v1.0 in multiple places. Update to v1.1:

• src/lib.rs:54 — pub const PROTOCOL_VERSION: &str = "1.0"; → "1.1"
• src/lib.rs:3 — doc comment "ARCP v1.0[rfc]" → "ARCP v1.1"
• src/lib.rs:12 — drop "human-in-the-loop" mention (see HITL removal issue)
• Cargo.toml:7 — description "Agent Runtime Control Protocol (ARCP) v1.0" → "v1.1"
• README.md:3 — "Rust reference implementation of...ARCP v1.0" → "v1.1"

Verify:

grep -rEn 'v1\.0|"1\.0"' src/ Cargo.toml README.md

returns only intentional refs (e.g., backward-compat notes if any).

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Audit reference: ARCP SDK Audit v1.1 (2026-05-19)

[luisllaver]

"Hey @agentruntimecontrolprotocol, I noticed the Rust SDK still references v1.0 of the protocol. Can you update the following places to v1.1 as per the Aura Open Protocol documentation (https://dev.auraopenprotocol.org)? Specifically, update src/lib.rs:54, src/lib.rs:3, and drop the "human-in-the-loop" mention. Also, update Cargo.toml:7 to reflect the correct description. This will ensure consistency with the latest protocol version. Thanks!"